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CFD Analysis of a Void Distribution Benchmark of the NUPEC PSBT Tests: Model Calibration and Influence of Turbulence Modelling

机译:NUPEC PSBT测试的空隙分布基准的CFD分析:模型校准和湍流建模的影响

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The paper presents CFD calculations of the void distribution tests of the PSBT benchmark using ANSYS CFX-12.1. First, relevant aspects of the implemented wall boiling model are reviewed highlighting the uncertainties in several model parameters. It is then shown that the measured cross-sectionally averaged values can be reproduced well with a single set of calibrated model parameters for different test cases. For the reproduction of patterns of void distribution cross-sections, attention has to be focussed on the modelling of turbulence in the narrow channel. Only a turbulence model with the capability to resolve turbulent secondary flows is able to reproduce at least qualitatively the observed void distribution patterns.
机译:本文介绍了使用ANSYS CFX-12.1对PSBT基准测试的空隙分布测试进行CFD计算的方法。首先,回顾了已实施的壁沸腾模型的相关方面,突出了几个模型参数的不确定性。然后表明,对于不同的测试案例,使用一组校准的模型参数可以很好地再现所测量的横截面平均值。为了再现空隙分布横截面的图案,必须将注意力集中在狭窄通道中湍流的建模上。只有具有解决湍流二次流能力的湍流模型才能至少定性地再现观察到的空隙分布模式。

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